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(eive them, so that the hinge and bar may move forwarder back iirst, to allowthetcam' L to act asl above described, and, second, to, compensate for the shrinking or swelling of the door without at all weakening oWIjmiri/ter-n tering with the strength or efficiency of the lock. Y, i

O is the key1hole,P the tumblers, and Q the boltof an ordinary tumbler-lock, designed to be used when greater security is required. R and S are two sliding bars and catches.`

The bar 'it is provided with an arm, 6, which carries the catch, and against which the key acts in operatingA the bar. Said arm 6 is notched above and below, so as to iit into-a slit or channel in the bar S. Said notches serve as a guide to the bar S as the bars slide forward and back, upon each other. The lower end of said bar 'itis thickened to keep the bars parallel as they are operated. The bar S is also provided with an arm, 7, which carries a catch. The upper part of said bar is slit or channeled, so as to t the notched part ofthe arm 6. It is also furnished with a projection, 8, for the key to act upon in operating the bar.

When the bolt Q is thrown forward by the operation ot' the key, the bolt Qpresses against the inclined sides of the catches, which are attached to and form a part of the slide-bars R and S until said catches reach the cavities l and 2 holiowed out in the sides of the bolt for their reception. Then by the action of the coiled-wire springs T the catches are forced into the cavities, and when there no action of the key is able to force back the bolt, the only effect of such action being to force the shoulders of the catches against the solid partition of the lock. But when the catches are forced back by the action of the key U through the key-hole V, upon projections or pins on the bars R and S, or directly upon said bars, then while the catches are thus held back the bolt Q, can be operated by the key. The keyholes O and V are both covered by the bar B when said bar is shut.

V is a spring designed to throw out the bar when said bar has been unlocked, the projection w of the bar B passing through a hole in the lockplate and pressing down the spring W when the bar is shut, as represented in Fig. 2; but the bar being unlocked the elasticity of the spring "W throws out the bar, which may then be swung back against the door, where it is held by the operation of the cam L, as before described. y

A B C are the parts of an ordinary sliding spring-catch, which may be used when the Lck is attached to a swinging door, but may be dispensed with or operated differently when the lock is attached to a sliding door.

E E are catches, which are furnished with arms 9 l0 ll l2. The object of the arms 9 and l0 and one of the objects of the arms ll and 12 are to compel the catches to move in a direct line when operated by the tumbler I and the springs F. The catches E E are notched on both upper and lower sides, as represented by dotted lines -inmFig 16, the notchesonvone side having squarebottoms to take hold of the shoulders on the projection D of the bar B. On the other side the notches have inclined bottoms to allow the catches E .,Etobe moved back by the inclined end of the projection D pressing against the inclined bottoms of said notches. The arms 11 and lZ'also-h-ave notches i4 to receive the bolts of the small locks' G and H.

Y-lLis a double-acting tumbler, which is furnishedl with arms 13, which said arms, when the tumbler I is turned by the key G, force the said catches.

when the bar Bis eased, theprojeeuu nl, g

striking.v against V,the inclined vedgesof the catches E, forces them apart by compressing n the coiled-wire springs F until the shoulders of said projection have passed beyond said catches. Then the elasticity of the springs throws the catches forward and holds the bar securely until the catches are moved back by the action of the key G upon the double-acting tumbler I. If still greater security is rcquired, the small locks G and Hv(one or both) may be employed, the bolts of which shut into cavities 14, prepared in the catches E for their reception. Said locks G and H may be ordinary locks, or locks of more intricate workmanship, as required. They are attached inverted to the cap L and rest upon theshortposts, which form the t'ulcrums of the springs H', keeping said springs in place, and at the same time leaving aspace between the locks and thelock-plate A, so that when the keys enter the key-holes in the lock-plate they must be turned halfround before they can enter the key-holes proper of the small locks, thus rendering them very difficult or impossible to be picked, as the form of said key-holes cannot be seen from the outside and, further, from the position of said locks G and H any pressure applied to the tumbler I to unlock the bar B forces, or has a tendency to force, the catches E E against the edges of the bolts of the small locks G and H, which bolts are supported by the sides of the small locks resting against the solid sides or iianges of the lock-plate A, as represented in Fig. 17, thus enabling them to resist an irnmense pressure when thus applied.

H are springs for sliding the covers F into their places when the keys have been withdrawn from the key-holes.

The lock-plate is formed with a projecting flange, J on one part to overlap the edge of the other part, which, in connection with the bar, obviates the necessity of any bolts, uprights, or cross-bars to keep the doors in line, and at the same time prevents access to the bar to disturb or injure it through the aperture between the doors. Said plates have flanges K on each side of the bar to act as guides to the bar in shutting and also to afford additional support.

The lock is attached to the door by bolts M', the heads of which are cast in projections on the inner side of the lock-plate, thus rendering it impossible to reach their heads from the outside ofthe lock to cut them ofl' and remove the lock.

When only ordinary protection is required, the bar and its adjuncts only may be used; or the bar and its adjuncts and the small locks G and H, one or both, may be used; or the bar and the lock P Q and their adjuncts may be used; or all the parts, as the purposes for Which the lock is required may render necessary.

I claim- 1. The combination of the bar B with the catches E and the doubleacting` tumbler I', substantially as and for the purpose set forth.

2. The combination of the bar B and cam L with the recesses M and N of the projection C, substantially as and for the purpose set forth.

3. The combination of the plate I and its projections With the recess M and the bar B, substantially as and for the purpose set forth.

4. The combination of the bolt Q and the catches B and S, substantially as and for the purpose set forth.

5. The combination of the small locks G and H, one or both, with the catches E', substantially as and for the purpose set forth.

6. The combination of the ianges J' and K with the lock-plates A and the bar B, substantially as and for the purpose set forth.

H. H. BAKER.

Witnesses:

GRAS. G. CRAWFORD, J AMES T. GRAHAM. 

